package com.wpx.log.core.filter;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

import org.springframework.util.StreamUtils;

public class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {
	//保存流
	private byte[] requestBody = null;

	public BodyReaderHttpServletRequestWrapper(HttpServletRequest request) throws IOException {
		super(request);
		requestBody = StreamUtils.copyToByteArray(request.getInputStream());
	}

	@Override
	public ServletInputStream getInputStream() throws IOException {

		final ByteArrayInputStream bais = new ByteArrayInputStream(requestBody);

		return new ServletInputStream() {

			@Override
			public int read() throws IOException {
				return bais.read();
			}

			@Override
			public void setReadListener(ReadListener listener) {

			}

			@Override
			public boolean isReady() {
				return false;
			}

			@Override
			public boolean isFinished() {
				return false;
			}
		};
	}

	@Override
	public BufferedReader getReader() throws IOException{
		return new BufferedReader(new InputStreamReader(getInputStream()));
	}
}
